/Engine/Plugins/Runtime/DataRegistry/Source/DataRegistry/Public/DataRegistryTypes.h
Where the cache version comes from, the upper values of this can be used for game-specific sources
enum EDataRegistryCacheVersionSource { Invalid, DataRegistry, CurveTable, GameVersion1, GameVersion2, GameVersion3, GameVersion4, GameVersion5, GameVersion6, GameVersion7, GameVersion8, GameVersion9, GameVersion10, }